ABS / Traction Control / Stabilitrak / Parking Assist Issue

[Firefighter1466]

EDIT: 2018 Chevrolet Silverado LTZ Z71 5.3L Crew Cab short bed

 

As the title suggests, I've got a ton of issues that I feel may be one simple cause, but can't narrow it down yet. It all started about 2 years ago when my truck was hit by a drunk driver while I was turning into my driveway. Luckily I managed to get most of the way into my driveway so it hit part of my truck bed and destroyed the rear bumper.

 

Insurance paid out like it was supposed to and the shop repaired everything, or so I thought. They were friends of a friend so I took their word when they told me I needed to have a dealership reset the ABS/traction control lights. Anyways, long story short it took me a while to get around to it, only to find out that the ABS system self checks each time the vehicle is started, so I got conned out of something, but it's been so long now, it's my problem..

 

I decided to look into it myself and bought a decent scanner that detects both OBD and ABS information. Here are the three codes I received:

 

C0050-04 - Right Rear Wheel Speed Sensor Circuit - Open

U0077-00 Control Module Communication Chassis Expansion CAN Bus Off

U0126-00 Lost Communication with Steering Wheel Angle Sensor Module

 

When I start my vehicle, the parking assist light in the console flashes on for a few seconds, then off. Followed by the ABS light and traction control lights staying on, as well as a pop up telling me stabilitrak was off and the parking assist was off. Pressing the button to turn parking assist on does nothing. Normally it would beep when you get too close and show the forward bars to show how close you are. The rear camera still works, but I'm getting no alerts, it's essentially disabled like it states.

 

I'm assuming all of this is tied into one issue, but I just can't isolate it yet. I was hoping someone here might be able to point me in the right direction of what may be causing all of these issues. I checked all the wiring that I could physically get to and all of the looms like good, all of the wheel sensor wiring looks fine. I also found this link in my google escapade and checked these locations, and best I could tell the looms are virtually untouched. They're still fully surrounded and protected by the wire loom plastic.

 

https://gm-techlink.com/?p=11405

 

Any thoughts on what may be causing all of these issues, or some suggestions to test and isolate the cause?

 

Thanks in advance,

One confused Firefighter...

Edited February 15, 2022 by Firefighter1466

[ajdata]

Any resolution to this problem?  My 2014 just started doing the same thing on a road trip over the weekend.  The errors show up while driving, but when I turn off the truck and start it up they are gone.